Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1975-06-19
1976-10-26
La Roche, Eugene
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250214AG, 315 12R, 323 18, H01J 4330
Patent
active
039886115
ABSTRACT:
A direct current power supply circuit for a photomultiplier tube comprises a step-up transformer with a secondary winding connected to rectifier means feeding output terminals. The primary winding in series with a transistor switch is connected across a d.c. supply source and the switch is controlled by pulses from a pulse generator which is switched on to produce pulses and hence to switch current in the primary winding when a control signal opens a gate in a feedback circuit of the pulse generator. The control signal is derived from the photomultiplier circuit and the circuit operates with the gate opening and closing as necessary to obtain the required voltage. The control signal may be derived from across an anode resistor of the photomultiplier tube or across a resistor in series with the dynode resistor chain according to the characteristics required.
REFERENCES:
patent: 2971433 (1961-02-01), Akin
patent: 3487222 (1969-12-01), Martens
patent: 3611042 (1971-10-01), Boronkay
patent: 3653763 (1972-04-01), Davies
patent: 3680957 (1972-08-01), Fukuda
patent: 3694659 (1972-09-01), Ramsay et al.
Connors Edward F.
La Roche Eugene
Medical & Electrical Instrumentation Company Limited
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